HP 40gs Manuel d'utilisateur Page 205

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Computer Algebra System (CAS) 14-23
Typing:
gives:
2
NOTE: To find the limit as x approaches a
+
(resp a
), the
second argument is written:
X=A+0(resp X=A-0)
For the following expression, find the limit as x
approaches +:
Typing:
produces (after a short wait):
NOTE: the symbol is obtained by typing SHIFT 0.
To obtain –:
(–)
To obtain +:
(–)(–)
You can also find the symbol in the MATH key’s
Constant menu.
PREVAL Evaluate a primitive
PREVAL has three parameters: an expression F(VX)
dependent on the variable contained in VX, and two
expressions A and B.
For example, if VX contains X, and if F is a function,
PREVAL (F(X),A,B) returns F(B)-F(A).
lim
NTANX() TAN N X)(
SIN N X()NSINX()
-----------------------------------------------------------------
0,
⎝⎠
⎛⎞
xxx++ x
lim XXX++ X +,
⎝⎠
⎛⎞
1
2
---
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